Tuesday Dec. 6, 2014Write in your agenda:Daily Academic VocabularyInformational Text/Main Idea & Supporting Details

LibraryHomework: Read for 3o minutes and complete annotation log.

Informational TextIn your interactive notebooks add Features of

Informational Text in your table of contents. This will be page 40.

12-1-14 Informational Text Featurespage 54

12-1-14 Main Idea page 5512-1-14 Main Idea page 5612-1-14 Main Idea page 57After I read about Informational Texts we will

complete the WEB as a class.

Main IdeaWe will be focusing on finding the main idea

and supporting details of what we read this week.

The main idea is the key concept expressed by a paragraph, passage, or story.

Main ideas may be stated in a text or merely implied by the text.

Supporting details explain or expand main idea.

Recognizing main ideas helps the reader remember important information.

Implied main ideas are inferred from an analysis of the details.

LasersThe informational texts in this book all have

lasers as a subject.Lasers can focus on microscopic things that

are millions of miles away. They can operate on tiny objects or on huge ones. What can you infer, or tell from this?

Many writers use graphic and text features. Using these features helps them make their writing unique and interesting. Informational texts are filled with graphic and text features.

Read Page 5 Lasers All Around Us

Shedding Light on LasersRead page 6Based on the title and illustrations, what do

you predict this informational text might be about?

Read pages 7-10As a class we will complete a main idea chart

form Shedding Light on Lasers.

Shedding Light on LasersIntro: Page 6

Physicist Theodore Mainman and his assistant Irnee D’Haenens, created the first laser beam

They made a machine with a tube and a light bulb with a ruby jewel inside.There were mirrors at each end.They turned on the light bulb, the ruby began to glow , and a red light shot out one end of the tube.

Shedding Light on LasersThe Energy of Lasers (Page 6-8)

A laser’s light contains energy in the form of waves and particles.

Light is energy. It can act as waves or like a collection of particles. The particles hit a surface and bounce back. The light is the first laser excited Ruby Adams, which made red light. Mirrors reflected the light particles, making them line up together. They pass through the thin mirror as a laser beam.

Shedding Light on LasersA Ver y Special Light(pages 8-10)

Laser light is very different from regular light in its colors and waves.

Regular light has many colors, each with its own wave sizes and shape. Each kind of laser has one color and waves of one shape and size. Laser light does not spread out like regular light. It is very thin and sharp, so it can cut through things.

Mapping Cities and BrainsBased off the title and graphics what do you

predict this section of our book will be about?Read Pages 12-14Yesterday we identified main ideas about

lasers and the details that support those ideas. Some of those main ideas are stated in the text and some are suggested by text features and details.

What main ideas do the graphics and text features suggest in this text?

Mapping Cities and BrainsHow do the headings in “Mapping Cities and

Brains” and “Shedding the Light of Lasers” help you understand important ideas in the texts?

How does the author show she has done good research?

How do the details in each section make the main idea clear?

Where has the author used graphic and text features? How do these examples of graphic and text features help you understand the important ideas better?

Mapping Cities and BrainsIntro: Page 12 • Lasers reveal

surprising secrets.• Lasers explored an

ancient Maya city.• They explored a fruit

fly’s brain.

A Lost City Is Found: Pages 12-13

• In 2009, scientists began using a laser to “see” all of Caracol an ancient Maya city.

• The city of 140,000 in Belize, Central America was abandoned 1,000 yrs. ago.

• Plants and animals grew over it.

• A laser beam shot from a plane bounced off objects on the ground.

• It made a picture of what things looked like below the plants.

• It took only four days and revealed a larger city than expected

Tiny Secrets Come to Light: pages 13-14

• Lasers also reveal very small things that help us learn.

• Fruit flies are smaller and easier to study.

• Fruit fly research can be applied to people, helping them heal and learn.

• A map of the brain is made as it thinks, eats, and jumps.

• Learning about signal paths might show how we think and how to strengthen paths.